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• W4386523525 abstract "ABSTRACT Shotcrete is a support system that is sprayed onto the surface of excavated tunnels and mines to create a self-supporting layer. It is an economic and integral solution to ground support in civil and mining construction projects. To ensure the long-term stability and safety of underground structures, it is essential to understand shotcrete's performance and failure mechanisms and to develop effective design methods. While previous studies have elucidated the performance and failure mechanisms of shotcrete, many unknowns and misinterpretations remain. This study conducted a numerical analysis replicating full-scale load-deflection tests in comparison with field test results. Parametric studies were also performed on the interaction between support elements and shotcrete adhesion under different loading configurations. The simulation revealed that the ultimate capacity of the shotcrete liner is primarily governed by flexural tensile failure mode, and the residual bonded area along the shotcrete panel periphery after the major bonding failure plays an important role in increasing the apparent flexural failure resistance of the shotcrete liner. A new alternative shotcrete design method based on the bending moment coefficient has been proposed and compared with empirical support design methods. INTRODUCTION Shotcrete refers to a ground-support system that is pneumatically sprayed, typically onto the exposed surface or an excavation face to produce a compacted self-supporting and load-bearing layer for underground structures. Today shotcrete has become an essential component of an initial ground support system or permanent structural lining that can be an economic and integral solution to a host of applications in civil and mining construction. Therefore, it is crucial to comprehend the performance and failure mechanisms of shotcrete as a ground-support system and to develop practical and effective design methods that can ensure the long-term stability and safety of underground structures. Many researchers, Barrett and McCreath (1995), Kaiser, and Tennent (2001), and Bernard (2004), have elucidated the performance and failure mechanism of the shotcrete liner. However, many unknowns and misinterpretations remain on the failure process of shotcrete panel, such as: the interactions between shotcrete and rock bolt configuration, and the effect of the shotcrete adhesion, etc. These factors play an important role in the understanding and development of a more practical and suitable shotcrete lining design. Thus, the main objective of the paper is to: 1) investigate the influence of those key factors which could affect the performance and the failure mechanism of the shotcrete, by means of replicating the full-scale load-deflection test using Finite Element Method (FEM) analysis, 2) propose a new method of shotcrete design based on the findings above." @default.
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• W4386523525 date "2023-06-25" @default.
• W4386523525 modified "2023-10-16" @default.
• W4386523525 title "Evaluation of Shotcrete Performance from Full-Scale Load-Deflection Tests Using Numerical Analysis" @default.
• W4386523525 doi "https://doi.org/10.56952/arma-2023-0553" @default.
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